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Bluetooth Low Energy (a.k.a Bluetooth LE, BTLE, Bluetooth Smart)

Send integer through BLE

Topic last updated 21 Sep 2015, by yacire El Rhomari. 2 replies
yacire El Rhomari
20 Sep 2015

Hi everybody,

I have a problem when i want to send integer value through BLE in NRF51 DK. I have four characteristics like that:

ReadWriteGattCharacteristic<uint16_t> reveil; ReadWriteGattCharacteristic<uint16_t> jours; ReadWriteGattCharacteristic<uint16_t> vibrationOn; ReadWriteGattCharacteristic<uint16_t> vibrationOff;

but when i send integer value through nrf Master app, it doesn't work. For example, when i send the integer 1000 , i receive in my characteristic the Hexadecimal value 0xE803 (59395 decimal value), i don't understand why ???

It is not possible to send an integer value upper to 256 trough BLE ?

Thanks for your help, Yass.

Philip Freidin
21 Sep 2015

You asked this question twice. Maybe once is enough.

You are looking at the data bytes in the wrong order. Swap the bytes and you get 1000 decimal == 0x03E8

yacire El Rhomari
21 Sep 2015

Thanks for your answer and help Philip,

Yes sorry for my double post.

i understand better now. Yass.